Open AccessNovel CMOS MO‐CFDITA based fully electronically controlled square/triangular wave generator with adjustable duty cycle
Author(s) -
Chaturvedi Bhartendu,
Kumar Atul
Publication year - 2018
Publication title -
iet circuits, devices and systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.251
H-Index - 49
ISSN - 1751-8598
DOI - 10.1049/iet-cds.2017.0553
Subject(s) - generator (circuit theory) , duty cycle , cmos , electrical engineering , square wave , operational transconductance amplifier , capacitor , transconductance , amplifier , voltage , shunt generator , chopper , transistor , electronic engineering , power (physics) , operational amplifier , engineering , permanent magnet synchronous generator , physics , quantum mechanics
This study presents a novel square/triangular wave generator based on multiple‐output current follower differential input transconductance amplifier (MO‐CFDITA) with reduced complexity in terms of transistors. The proposed generator comprises of single MO‐CFDITA and one grounded capacitor only which makes the proposed generator circuit suitable to integrated circuit implementation. The proposed generator provides output square wave in current mode and output triangular wave in voltage mode. The amplitude of current‐mode square wave is electronically and independently tunable via bias current. The DC level of the triangular wave is also electronically adjustable. The proposed generator has dual‐slope operation and its duty cycle is adjustable with the help of DC current source over a range of 5–95%. The proposed generator consumes a power of 1.45 mW only and it is usable up to 50 MHz which is quite good operating frequency range. To examine the performance of the proposed generator, the cadence VIRTUOSO simulation results have been depicted. Additionally, the simulation results and performance parameters of complementary metal–oxide–semiconductor (CMOS) MO‐CFDITA are included. The practicality of the proposed generator is verified through the experimental results.